Comments on: Burris Signature Rings — Calculating Actual Elevation Changes

By: Dan Conzo

Dan Conzo — Sat, 18 Aug 2012 14:06:52 +0000

The NBRSA used inches instead of moa and noted the change, so did John Unertl back then, which was probably the most used scopes of the early years of benchrest. It was explained by the NBRSA and Unertl, however. But to get to the nitty-gritty–Unertl mounts (external) moved the POI 1/4″ @ 100 yards per click on thimbles and each click movement was .0005″ (1/2 thousandths)with a 7.2″ base separation (double the 3.6″ standard above. Here is the formula that has worked for a lot of us for many years using the above criteria: 1.8 divided by base separation x shim thickness (in number of thousandths not actual designation; example 1 instead of .001″) x 2 = POI change @ 100 yards. It works.

By: Jeff Williams

Jeff Williams — Fri, 17 Aug 2012 23:49:56 +0000

Thanks for posting this again. I am working on getting a scope mounted on
Weatherby Vanguard 2 and now know that I need another Pos-Align Insert kit to get everthing set up right. I need a +20 and a -20 instead of a +20 and -10 with the distance between the rings…Damn I like this site.

By: Tim Smith

Tim Smith — Tue, 23 Aug 2011 03:00:39 +0000

If you want a formula that includes different ring spacing, try this one.

MOA = tan^-1(offset/spacing) * 60

Here is the original link from when I worked it up.

http://www.reloadbench.com/ubb/Forum24/HTML/000426.html

By: Nathan Kuehl

Nathan Kuehl — Tue, 12 Oct 2010 03:20:31 +0000

OK, I looked at it again and now understand the ‘Note’.

40 MOA * 1.047 = 41.88″

(.040/3.439) * 3600 = 41.87″ (~40 MOA)

Dividing by 3.6 and multiplying by 3600 is the same as multiplying by 1,000. Duh!

By: Boyd Allen

Boyd Allen — Mon, 11 Oct 2010 21:54:21 +0000

One thing that I forgot to mention in my earlier comment was that I agree completely with the first comment by Steve Clark. You don’t pair offset inserts of the same sign on the same ring.

By: Nathan Kuehl

Nathan Kuehl — Mon, 11 Oct 2010 21:12:09 +0000

I looked at the calculation and I see 6″; where did the 3.6″ come from? If you use the formula with 3.6″ spacing and .040″ offset, don’t you get 40″ or 38.2 MOA at 100 yds?
(.040/3.6) X 3600 = 40″ at 100 yds

1 MOA = 1.047″ at 100 yds

40″/1.047= 38.2 MOA

What am I missing?

By: John Cole

John Cole — Tue, 29 Dec 2009 12:55:46 +0000

I won’t use any thing else. In fact I’d pick a gun to fit the bases just to use the Signature rings. Get the offset combo pack and have limitless adjustment. They hold tight and can’t booger your scope. Say you need to to bring your crosshair down and to the right, you can install the offset inserts at 45 degrees in the ring. Just a sweet setup.

By: Boyd Allen

Boyd Allen — Tue, 25 Aug 2009 05:19:46 +0000

Good job! I have done what you described, as well as combining vertical and horizontal adjustments by rotating the inserts. When you do the latter, the math gets a little more interesting, and harder to explain, but the results can be very worthwhile.

By: f d shuster

f d shuster — Tue, 25 Aug 2009 02:40:40 +0000

The off-set inserts saved the day for me, after I had a Shilen barrel mounted on a Ruger #1B. The quarter rib must have been mounted off-center, because windage was radically off to the right. Was able to keep the scope (Leuplod) windage adjustemnt very close to center by using .020″ off-sets in both front and rear rings. The only type of rings I’ve bought, since they became available. Am even using the adapter bases so I can use them on Sako and the before mentioned Ruger receivers. I’ve also noticed that I do not have to tighten down the ring screws as tight as I did with conventional rings. Seems the nylon grips better.

By: Scott

Scott — Tue, 25 Aug 2009 00:03:34 +0000

The Burris Signature Zee rings have been the solution to the
dreaded “scope ring damage” for me the last 5 years or so.
Previously, I had been satisfied to match standard Weaver rings
but learned early on to match the top halves of the rings as close as possible to each scope. I even went so far as to use a piece of
Post-It note paper to ease the top ring half over the scope body
to elimnate any evidence of the typical scrub mark(s) as we often
see on used scopes.

Fortunately, I have not had to use the offset inserts to correct a
mis-aligned set of receiver screw holes.

The glass that I have used for 1K shooting that lack the needed
elevation adjustment to get out that far has been solved by using
Ken Farrell`s 20MOA scope bases.

Should someone question how viable the Signature rings are, I can
offer this tidbit…I used the Signaure Zee rings on my Savage LA
in 30-06 with the 190gr and heavier SMK`s with no scope issues at
the Full Bore Prone Rifle League @ Williamsport. (Bodines)

When I choose to offer a scope up for sale that has been used with the Signature series rings, I do not have to include in the description,
“minor ring marks”.

Your first visit at the range with these may take some time, especially
if you need to use the offset inserts to keep your scope adjustments as close to “centered” as possible. The effort is well worth the time spent.

Scott